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<title>Return hash id for given object</title>
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<div class="refnamediv">
<h1 class="refname">spl_object_hash</h1>
<p class="verinfo">(PHP 5 >= 5.2.0)</p><p class="refpurpose"><span class="refname">spl_object_hash</span> — <span class="dc-title">
Return hash id for given object
</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.spl-object-hash-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>spl_object_hash</strong></span>
( <span class="methodparam"><span class="type">object</span> <code class="parameter">$obj</code></span>
)</div>
<p class="para rdfs-comment">
This function returns a unique identifier for the object. This id can be
used as a hash key for storing objects or for identifying an object.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.spl-object-hash-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">object</code></em></span>
<dd>
<p class="para">
Any object.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.spl-object-hash-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
A string that is unique for each currently existing object and is always
the same for each object.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.spl-object-hash-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3921">
<p><strong>Example #1 A <span class="function"><strong>spl_object_hash()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$id </span><span style="color: #007700">= </span><span style="color: #0000BB">spl_object_hash</span><span style="color: #007700">(</span><span style="color: #0000BB">$object</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$storage</span><span style="color: #007700">[</span><span style="color: #0000BB">$id</span><span style="color: #007700">] = </span><span style="color: #0000BB">$object</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.spl-object-hash-notes">
<h3 class="title">Notes</h3>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
When an object is destroyed, its hash may be reused for other objects.
</p>
</p></blockquote>
</div>
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